Antiskid mechanism for vehicles



March 31, 1936.

FfM. MOODY ANTISKID MECHANISM FOR VEHICLES Filed March 4, 1935 2 Sheets-Sheet l M 31, was.

F. M. MOODY ANTISKID MECHANISM FOR VEHICLES Filed March 4, 1935 2 Sheets-Sheet 2 Patented Mar. 31, 1936 UNITED STATE i ATENT QFFICE 2,035,822 ANTISKID MECHANISM FOR VEHICLES Fred M. Moody, Whitman, Mass.

Application March 4,

1935, Serial No. 9,203

2 Claims. (0]. 1885) skidding of the latter.

To this end I have provided an improved antiskid mechanism having the features of construction and operation set forth in the following description, the several novel features of the invention being separately pointed out and defined in the claims at the close thereof.

In the accompanying drawings:

Figure l is a top plan view of a portion of the rear end of an automobile constructed in accordance with my invention.

Figure 2 is a section on line 22 of Fig. 1 showing the anti-skid mechanism in its inoperative retracted condition.

Figure 3 is a fragmentary elevation, partly in section, showing the anti-skid mechanism adjusted to prevent skidding.

In the accompanying drawings, I0 represents the chassis frame of an automobile, said frame being connected through the usual springs H with the rear axle-housing that is indicated generally at 52. This housing is made with a central enlarged portion l3 which, as usual, provides a chamber for the diiferential gearing forming part of the rear axle structure. The two shafts of the axle occupy tubular end portions M at opposite sides of the central portion l3 and each has fixed on it one of the rear Wheels l5.

Each tubular end portion M of the axle hou ing is constructed adjacent to the proximate side of the central portion 43 with a journal bearing on which is rotatably mounted an eccentric ii that is compounded with a gear ll occupying a recess or chamber l 8, Fig. 3, formed in said central portion l3.

Each eccentric I6 is held against axial movement on the housing in one direction by the central portion of the latter and against axial movement in the opposite direction by a col ar l8.

Each collar I8 is made up of two segments which are connected and clamped tightly on its end portion M of the housing by means of a pair of bolts I9.

Adjacent to each side thereof the central portion It of the top with a groove 20, Figs. 2

ates with and which is occupied by upon its bottom side with axle housing is made upon its and 3, which comthe proximate gear chamber 58 a rack-bar 2| formed teeth meshing with the gear ll of said chamber.

Thus it will be clear that endwise movement of the two rackbars 2! will cause each of the latter to rotatively adjust its gear I l and eccentric bar 2! is held within its groove 29 by a cap-plate 33 removably fastened by the axle housing.

screws to the top of Each rack-bar 2I has mounted upon its forward end a coiled spring 22 whose rear end bears against an abutment collar 23 which in turn bears against a pin 24 carried by the rack-bar.

The forward end of eac against a collar 25 slidably rack bar Zl and by its spring against a stop the rack bar.

Each collar 25 is provided wardly extending side arms ends an arm 28 fast on a h spring 22 bears mounted upon its this collar is normally held pin 26 carried by transverse rock-shaft 29 journaled in bearings provided on chassis frame l0.

Normally the rack-bars 2! are yieldingly held at the limit of their forward movements by a coiled spring 30 mounted on rock-shaft 29, one

end of said spring being connected with the rock-shaft and the opposite end with the chassis frame I.

The rock-shaft 29 also has fixed on it an upstanding arm 3| which is is within the reach has it two rings 32 each located so that it of the driver of the vehicle.

sely mounted upon of which may, as shown,

be made with an outer marginal portion that is sharpened to provide an for engagement with 32 are free to rotate annular knife-edge the ground. These rings on the eccentrics so that the latter serve as journals for the same.

Normally the eccentrics I it are maintained in elevated positions with their rings out of engagement with the ground and well above the latter.

When the anti-skid mechanism is to be thrown into action the driver shoves 3! thereby forcing the collars forward on the arm 25 rearwardly and the latter act through springs 22 and abutbars 2| rearwardly. the rack-bars acts wing eccentrics I 6 the housing until the rings 32 engage and yieldingly press against the ground as shown in Fig. 3.

Each pair of rings 32 is rotatably confined between the proximate side of the middle portion I3 of the housing and adjacent collar l8 and as a result the engagement of the rings with the ground eflectively checks and prevents sidewise skidding of the vehicle. At the same time the rings are free to roll forwardly over the ground if, as is usually the case, the vehicle is moving forward when the anti-skid mechanism is thrown into action.

It will also be clear that while the rings 32 are in engagement with the ground and the Vehicle is moving forward, the springs 22 will function to maintain the rings continuously in engagement with an uneven roadway.

What I claim is:

1. In an automobile, in combination, a rear axle housing; an eccentric rotatably mounted on said housing so as to swing on the axis of the latter toward and from the ground; a ring member rotatably mounted upon said eccentric and adapted to have rolling engagement with the ground when said eccentric is swung downwardly thereby to hold the vehicle against skidding sidewise; a gear compounded with said eccentric and rotatable on the axis of said housing, and means operable by the driver of the vehicle for rotating said gear and eccentric, said means including an endwise movable toothed rack-bar slidably supported by said housing and engaging said gear.

2. In an automobile, in combination, a rear axle housing; an eccentric rotatably mounted on said housing so as to swing on the axis of the latter toward and from the ground; a ring member rotatably mounted upon said eccentric and adapted to have rolling engagement with the ground when said eccentric is swung downwardly thereby to hold the vehicle against skidding sidewise; a gear compounded with said eccentric and rotatable on the axis of said housing, and means operable by the driver of the vehicle for rotating said gear and eccentric, said means including an endwise movable toothed rack-bar slidably supported by said housing and engaging said gear, a manually operated member accessible to the driver of the vehicle, and mechanism including a spring through which movement of said manually operated member in one direction acts to swing said eccentric downwardly and to hold said ring member yieldingly against the ground.

FRED M. MOODY. 

